Damp repairs

we own one flat in a small block of just 3 flats. we are a very small strata plan (just 5 lots).

the kitchen cupboards of the ground floor flat have developed mould on
them and started to rot. it turns out these walls are below ground level (i.e. the outside
path is higher than the inside floors on these 2 walls), something we were never aware of.

the strata has already paid to lower the external path and install external drainage to improve the damp in these walls. We need advice about who is responsible to pay for the internal repairs.

the affected owner wants the strata to replace the damaged kitchen cupboards (which due to the design of the very small kitchen requires pulling out most of the lower section of the kitchen and replacing it), as well as pay for anything broken as a

result, i.e. granite benchtops and tiles and pay all associated costs ie plumbing and electrician to do this.

we, the other owners, are happy to pay for an internal damp course to run behind the kitchen as this is part of the repairs to common property and repairs to common property we understand we are required to do, however, do we have to pay for the repairs to the kitchen as well? The advice we have received is conflicting.

we thought that the repairs to the kitchen would be the owners responsibility as it is not common property?

to add to the confusion, the owner of the affected flat showed us a building report she had done when she bought the flat 6 yrs ago, which alerted her to the lower internal floors relative to the outside, the high damp readings in these walls, and the likelihood of damp damaging the kitchen if not addressed, and she never brought this to our attention.

i would really appreciate any advice you could provide or tell me who can advise us on this matter?